MECHANICS AND MANUFACTURES. 39 



The ingredients composing these stones are chemically united, forming 

 a stone of great strength, and far better than the stones the particles 

 of which are simply united in what is known as a mechanical mixture. 

 Their grinding machines are gotten up in a very convenient form and 

 are adapted to the sharpening of saws, and innumerable other uses. 



Mr. L. D. Wheeler had upon exhibition a large collection of his 

 newly-invented Fan Blowers, which almost equalled, as far as blowing 

 was concerned, the Pneumatic Alarm Go's collection, the main differ- 

 ence being that while the horns were doing their work with a deal of 

 vociferation, the fan was blowing most furiously and in the most noise- 

 less manner. This Fan certainly equals, in nearly every respect, and 

 exceeds in some, the celebrated Sturtcvant Fan, which is now consid- 

 ered the standard of excellence. This invention is also a Fitchburg 

 affair, and, after hoeing a hard row, is now beginning to be appreciated. 

 This collection also contained some Washing Machines and other inven- 

 tions which are working their way into public favor. 



Mr. Knight of Hillsborough, exhibited a Window Fastener, for 

 fastening either the top or bottom sash of a window in any desired 

 position, and securely holding it from being moved either up or down 

 from the outside of the house. This should be seen by persons in 

 want of window fastenings. 



Mr. M. Bowker, formerly of this town, had upon exhibition a newly 

 invented Tobacco Cutter of great power and of excellent design. 



Clement & Hawkes Manufacturing Co. of Northampton, exhibited 

 an ingeuiously gotten up Belt Clamp, unlike any which we have ever 

 before seen. We have all been content to use the old-fashioned wooden 

 clamp and we do not remember having seen any other effort in this 

 direction. This we should judge to be a very convenient appliance for 

 the use intended. 



The collection of Cement Pipe exhibited by A. C. Kinney of Fitch- 

 burg, was superior in point of finish to any we have before seen, and 

 he claims a superiority in his construction of the joints, which are very 

 easily and strongly fastened together. The inside finish of these pipes 

 is remarkable for its peculiarly glossy surface. 



L. W. Merriam of ^his town, showed a new style Roofing Bracket 

 which is a late invention and is the best thing of this kind that he 

 has yet produced. This is made of malleable iron and is cast all in 

 one piece. The arrangement for attaching this bracket to the roof is 

 very simple, convenient and efiicient. Mr. Merriam seems to be the 

 only man who has produced a good invention in this line. 



This town is not noted for its cooperage, but the beautiful handiwork 

 exhibited by F. G. Kinsman, on this occasion, demonstrates that he is 

 master of his business. Mr. Kinsman is a young man of merit and 

 deserves the patronage of our people who desire anything in his lino. 



J. M. Marston of No. 6 Tabor St., Boston Highlands, exhibited, to 

 toe full satisfaction of all interested, a new Foot Power arranged for 

 running a circular saw. This consisted of a very heavy balance wheel 

 moved by a treadle, the balance wheel having upon its periphery a 

 tooth gear which fits into a toothed arbor upon which are placed saws, 



